| Welwyn Garden City to Beocin | 1,015.55 mi (1,634.37 km) |
| Welwyn Garden City to Blace | 1,155.24 mi (1,859.17 km) |
| Welwyn Garden City to Bogatic | 1,019.85 mi (1,641.28 km) |
| Welwyn Garden City to Bojnik | 1,184.21 mi (1,905.81 km) |
| Welwyn Garden City to Boljevac | 1,159.59 mi (1,866.18 km) |
| Welwyn Garden City to Bor | 1,153.39 mi (1,856.20 km) |
| Welwyn Garden City to Borca | 1,057.31 mi (1,701.57 km) |
| Welwyn Garden City to Bosilegrad | 1,236.30 mi (1,989.63 km) |
| Welwyn Garden City to Brus | 1,141.34 mi (1,836.81 km) |
| Welwyn Garden City to Bujanovac | 1,210.00 mi (1,947.31 km) |
| Welwyn Garden City to Cacak | 1,092.83 mi (1,758.75 km) |
| Welwyn Garden City to Cajetina | 1,073.85 mi (1,728.19 km) |
| Welwyn Garden City to Cicevac | 1,143.90 mi (1,840.93 km) |
| Welwyn Garden City to Coka | 1,005.31 mi (1,617.90 km) |
| Welwyn Garden City to Crna Trava | 1,216.00 mi (1,956.97 km) |
